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[diderot] Diff of /branches/pure-cfg/TODO
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Diff of /branches/pure-cfg/TODO

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revision 763, Thu Apr 7 19:57:56 2011 UTC revision 822, Thu Apr 14 14:24:20 2011 UTC
# Line 1  Line 1 
1  Outer products  ========================
2      syntax [DONE]  SHORT TERM =============  (for curvature-based VR)
3      typechecking  ========================
4      IL and codegen  
5    want: warnings when D (and likely I) is declared as a
6    variable name (now get confusing error messages now)
7    
8    For RGB color output of 2D transfer function (indexed by
9    kappa1,kappa2), or for a 1D transfer function, will need
10    something akin to convolution on vector images
11    
12  Add M dot v, v dot M, and M dot N  IL support for higher-order tensor values (matrices, etc).
13        tensor construction [DONE]
14        tensor indexing [DONE]
15        tensor slicing
16        verify that hessians work correctly
17    
18  Identity matrix [DONE up to code generation]  Outer products [DONE]
19    
20  trace [DONE]  Add M dot v, v dot M, and M dot N [DONE]
21    
22  expand trace in mid to low translation  Identity matrix [DONE up to code generation]
23    
24  extend norm (|exp|) to all tensor types  Zero tensor [DONE up to code generation]
25    
26  Infix dot product and cross product [DONE]  trace [DONE]
27    
28  lerp on scalars and vectors [DONE]  extend norm (|exp|) to tensor[3,3]
29    
30  Use ∇⊗ etc syntax  Use ∇⊗ etc. syntax
31      syntax [DONE]      syntax [DONE]
32      typechecking      typechecking
33      IL and codegen      IL and codegen
# Line 28  Line 38 
38          value construction: '{' e1 ',' … ',' en '}'          value construction: '{' e1 ',' … ',' en '}'
39          indexing: e '{' e '}'          indexing: e '{' e '}'
40    
41  IL support for higher-order tensor values (matrices, etc).  Infix dot product and cross product [DONE]
42      tensor construction  
43      tensor indexing and slicing  lerp on scalars and vectors [DONE]
44    
45    ==============================
46    other SHORT TERM =============  (including needed for LIC)
47    ==============================
48    
49    determinant ("det") for tensor[3,3]
50    
51    Decide if we want to allow redefinitions of variables
52      (as in vr-lite-cam.diderot)
53    
54    extend norm (|exp|) to all tensor types
55    
56    extend normalize to all tensor types
57    
58    vector fields: convolution on vector images
59    
60    expand trace in mid to low translation
61    
62    value-numbering optimization
63    
64  Add type aliases for color types  Add type aliases for color types
65      rgb = real{3}      rgb = real{3}
66      rgba = real{4}      rgba = real{4}
67    
68    ==============================
69    MEDIUM TERM ================== (needed for streamlines & tractography)
70    ==============================
71    
72    ability to emit/track/record variables into dynamically re-sized
73    runtime buffer
74    
75    evals & evecs for symmetric tensor[3,3]
76    
77    tensor fields: convolution on general tensor images
78    
79    ==============================
80    other MEDIUM TERM ============ (needed for particles)
81    ==============================
82    
83    run-time birth and death of strands
84    
85    "initially" supports lists
86    
87    "initially" supports lists of positions output from
88    different initalization Diderot program
89    
90    spatial data structure that permits strands' queries of neighbors
91    
92    proper handling of stabilize method
93    
94    Add support for code like
95    
96            (F1 if x else F2)@pos
97    
98    This will require duplication of the continuation of the conditional (but we should only
99    duplicate over the live-range of the result of the conditional.
100    
101    ==============================
102    other MEDIUM TERM ============
103    ==============================
104    
105    support fog Python interop and GUI
106    
107    ==============================
108    LONG TERM ====================
109    ==============================
110    
111    Better handling of variables that determines the scope of a variable based on its actual use,
112    instead of where the user defined it.  So, for example, we should lift strand-invariant variables
113    to global scope.  Also prune out useless variables, which should include field variables after the
114    translation to mid-il.
115    
116    co- vs contra- index distinction
117    
118    add ":" for tensor dot product (contracts out two indices
119    instead of one like •), valid for all pairs of tensors with
120    at least two indices
121    
122    some indication of tensor symmetry
123    (have to identify the group of index permutations that are symmetries)
124    
125    dot works on all tensors
126    
127    outer works on all tensors
128    
129    Einstein summation notation
130    
131    "tensor comprehension" (like list comprehension)
132    
133    Python/ctypes interface to run-timez
134    
135    ======================
136    BUGS =================
137    ======================
138    
139    test/mip-cam.diderot:
140        // generated C code looks like "(float)p_ui_0--0.5e0f"
141        //real rayU = 2.0*camUmax*(real(ui) - -0.5)/real(imgResU) - camUmax;
142    
143    test/vr-kcomp.diderot:
144        // HEY (scoping BUG): the strand parameters (e.g. ui, vi) ...
145    
146    test/zslice2.diderot:
147    // but is this not valid syntax for creating field in one shot?
148    //field#2(3)[] F = (load("../data/zimg112.nrrd")) ⊛ bspln3;
149    // It is valid syntax, but there is a bug in the conversion from HighIL to MidIL
150    
151    test/zslice2.diderot:
152    // HEY (bug) bspln5 leads to problems ...
153    //  uncaught exception Size [size]
154    //    raised at c-target/c-target.sml:47.15-47.19
155    //field#4(3)[] F = img ⊛ bspln5;
156    
157    

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